/Engine/Source/Runtime/Engine/Classes/PhysicsEngine/PhysicsAsset.h
Utility for getting indices of all bodies below (and including) the one with the supplied name.
void GetBodyIndicesBelow ( [TArray](API\Runtime\Core\Containers\TArray)< int32 > & OutBodyIndices, [FName](API\Runtime\Core\UObject\FName) InBoneName, [USkeletalMesh](API\Runtime\Engine\Engine\USkeletalMesh) * InSkelMesh, bool bIncludeParent )